<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=US-ASCII">
<META content="MSHTML 6.00.6000.16640" name=GENERATOR></HEAD>
<BODY id=role_body style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Arial"
bottomMargin=7 leftMargin=7 topMargin=7 rightMargin=7><FONT id=role_document
face=Arial color=#000000 size=2>
<DIV>There were some Mark 10 heads produced with a manual guide positioning
adjustment. Perhaps this one is that with the knob off the adjustment
screw? Also the 15 mil heads still laid down a 10 mil track. The
width of the head was made larger to hopefully give a longer life.</DIV>
<DIV> </DIV>
<DIV>Chris Hill</DIV></FONT></BODY></HTML>